Primacoustic's ThunderTile is a combination sound absorber/noise blocking ceiling tile designed to retrofit into standard "T-bar" ceilings. It features a 3/4" (19 mm) high-density glass wool absorptive acoustical panel to control the reverberant field and improve room intelligibility. This is bonded to a 1/2" (13 mm) thick gypsum board that adds the required mass to stop noise from traveling from one room to another. The panel is coated with an acoustically transparent tissue finished in "Absolute White" to provide great light reflectance. This makes the TunderTile ideal for boardrooms, classrooms, video-conferencing suites, in fact any room that requires both acoustic sound absorption and noise blocking.